MODUL 3
COMMUNICATION
a) Asistensi dilakukan 1x
b) Praktikum dilakukan 1x
a) Memahami cara penggunaan protokol komunikasi UART,SPI, dan I2C pada Development Board yang digunakan
b) Memahami cara penggunaan komponen input dan output yang berkomunikasi secara UART, SPI, dan I2C pada Development Board
yang digunakan
1. STM32 NUCLEO-G474RE
Development Board STM32: 1 buah (Bisa menggunakan STM32F103C8T6 "Blue Pill" atau Nucleo-G474RE sesuai spesifikasi lab).
Bluepill
NucleoST-Link V2 / Programmer: 1 buah (Jika menggunakan Blue Pill. Untuk board Nucleo, ST-Link sudah terintegrasi).
Kabel Jumper (Male-to-Male, Male-to-Female): Secukupnya.
Breadboard / Project Board: 1 buah.
LED RGB (Common Cathode/Anode): 1 buah (Bisa diganti dengan 3 LED terpisah: Merah, Hijau, Biru).
Resistor
Push Button / Toggle Switch
Active Buzzer (3.3V - 5V)
Modul Sensor LDR
FAN
11. OLED
12. PIR SENSOR
13. INFRARED SENSOR
14. MOTOR SERVO
1.3.1 UART (Universal Asynchronous Receiver Transmitter)
UART (Universal Asynchronous Receiver-Transmitter) adalah bagian perangkat keras komputer yang menerjemahkan antara bit-bit paralel data dan bit-bit serial. UART biasanya berupa sirkuit terintegrasi yang digunakan untuk komunikasi serial pada komputer atau port serial perangkat periperal.
Cara Kerja Komunikasi UART
1.3.2 I2C (Inter-Intergrated Circuit)
Inter Integrated Circuit atau sering disebut I2C adalah standar komunikasi serial dua arah menggunakan dua saluran yang didisain khusus untuk mengirim maupun menerima data. Sistem I2C terdiri dari saluran SCL (Serial Clock) dan SDA (Serial Data) yang membawa informasi data antara I2C dengan pengontrolnya.
Pada I2C, data ditransfer dalam bentuk message yang terdiri dari kondisi start, Address Frame, R/W bit, ACK/NACK bit, Data Frame 1, Data Frame 2, dan kondisi Stop. Kondisi start dimana saat pada SDA beralih dari logika high ke low sebelum SCL. Kondisi stop dimana saat pada SDA beralih dari logika low ke high sebelum SCL. R/W bit berfungsi untuk menentukan apakah master mengirim data ke slave atau meminta data dari slave. (logika 0 = mengirim data ke slave, logika 1 = meminta data dari slave) ACK/NACK bit berfungsi sebagai pemberi kabar jika data frame ataupun address frame telah diterima receiver.
1.3.3 SPI (Series Peripheral Interface)
Serial Peripheral Interface (SPI) merupakan salah satu mode komunikasi serial synchronous berkecepatan tinggi yang dimiliki oleh STM32F407VGT6 dan Raspberry Pi Pico. Komunikasi SPI membutuhkan 3 jalur utama yaitu MOSI, MISO, dan SCK, serta jalur tambahan SS/CS. Melalui komunikasi ini, data dapat saling dikirimkan baik antara mikrokontroler maupun antara mikrokontroler dengan perangkat periferal lainnya.
• MOSI (Master Output Slave Input)
Jika dikonfigurasi sebagai master, maka pin MOSI berfungsi sebagai output. Sebaliknya, jika dikonfigurasi sebagai slave, maka pin MOSI berfungsi sebagai input.
• MISO (Master Input Slave Output)
Jika dikonfigurasi sebagai master, maka pin MISO berfungsi sebagai input. Sebaliknya, jika dikonfigurasi sebagai slave, maka pin MISO berfungsi sebagai output.
• SCLK (Serial Clock)
Jika dikonfigurasi sebagai master, maka pin SCLK bertindak sebagai output untuk memberikan sinyal clock ke slave. Sebaliknya, jika dikonfigurasi sebagai slave, maka pin SCLK berfungsi sebagai input
untuk menerima sinyal clock dari master.
• SS/CS (Slave Select/Chip Select)
Jalur ini digunakan oleh master untuk memilih slave yang akan dikomunikasikan. Pin SS/CS harus dalam keadaan aktif (umumnya logika rendah) agar komunikasi dengan slave dapat berlangsung.
Sinyal clock dialirkan dari master ke slave yang berfungsi untuk sinkronisasi. Master dapat memilih slave mana yang akan dikirimkan data melalui slave select, kemudian data dikirimkan dari master ke slave melalui MOSI. Jika master butuh respon data maka slave akan mentransfer data ke master melalui MISO.
1.3.4 STM32 NUCLEOG474RE
STM32 NUCLEO-G474RE merupakan papan pengembangan (development board) berbasis mikrokontroler STM32G474RET6 yang dikembangkan oleh STMicroelectronics. Board ini dirancang untuk memudahkan proses pembelajaran, pengujian, dan pengembangan aplikasi sistem tertanam (embedded system), baik untuk pemula maupun tingkat lanjut. STM32 Nucleo-G474RE mengintegrasikan antarmuka ST-LINK debugger/programmer secara onboard sehingga pengguna dapat langsung melakukan pemrograman dan debugging tanpa perangkat tambahan. Adapun spesifikasi dari STM32 NUCLEO-G474RE adalah sebagai berikut:
1.3.5 STM32 F103C8
STM32F103C8 adalah mikrokontroler berbasis ARM Cortex-M3 yang dikembangkan oleh STMicroelectronics. Mikrokontroler ini sering digunakan dalam pengembangan sistem tertanam karena kinerjanya yang baik, konsumsi daya yang rendah, dan kompatibilitas dengan berbagai protokol komunikasi.Pada praktikum ini, kita menggunakan STM32F103C8 yang dapat diprogram menggunakan berbagai metode, termasuk komunikasi serial (USART), SWD (Serial Wire Debug) atau JTAG untuk berhubungan dengan komputer maupun perangkat lain. Adapun spesifikasi dari STM32F4 yang digunakan dalam praktikum ini adalah sebagai berikut:
1.4 Bagian Bagian Pendukung
1.4.1 STM32 NUCLEOG474RE
1. RAM (Random Access Memory)
RAM (Random Access Memory) pada STM32 NUCLEO-G474RE digunakan sebagai memori sementara untuk menyimpan data selama program berjalan. Mikrokontroler STM32G474RET6 memiliki RAM sebesar 128 KB yang berfungsi untuk menyimpan variabel, buffer data, stack, dan heap.
2. Memori Flash Eksternal STM32
NUCLEO-G474RE tidak menggunakan memori flash eksternal. Seluruh program dan data permanen disimpan pada memori Flash internal mikrokontroler STM32G474RET6 dengan kapasitas 512 KB. Memori flash ini bersifat non-volatile, sehingga data dan program tetap tersimpan meskipun catu daya dimatikan.
3. Crystal Oscillator
STM32 NUCLEO-G474RE menggunakan osilator internal (HSI –High Speed Internal) sebagai sumber clock utama secara default.Penggunaan clock internal ini membuat board dapat beroperasi tanpa memerlukan crystal oscillator eksternal. Clock berfungsi sebagai sumber waktu untuk mengatur kecepatan kerja CPU dan
seluruh peripheral.
4. Regulator Tegangan
Untuk memastikan pasokan tegangan yang stabil ke mikrokontroler.
5. Pin GPIO (General Purpose Input/Output):
Pin GPIO pada STM32 NUCLEO-G474RE digunakan sebagai antarmuka input dan output digital yang fleksibel
1.4.2 STM32 F103C8
1. RAM (Random Access Memory)
STM32F103C8 dilengkapi dengan 20KB SRAM on-chip.Kapasitas RAM ini memungkinkan mikrokontroler menjalankan berbagai aplikasi serta menyimpan data sementara selama eksekusi program.
2. Memori Flash Internal
STM32F103C8 memiliki memori flash internal sebesar 64KB atau 128KB, yang digunakan untuk menyimpan firmware dan program pengguna. Memori ini memungkinkan penyimpanan kode program secara permanen tanpa memerlukan media penyimpanan eksternal.
3. Crystal Oscillator
STM32F103C8 menggunakan crystal oscillator eksternal (biasanya 8MHz) yang bekerja dengan PLL untuk meningkatkan frekuensi clock hingga 72MHz. Sinyal clock yang stabil ini penting untuk mengatur kecepatan operasi mikrokontroler dan komponen lainnya.
4. Regulator Tegangan
STM32F103C8 memiliki sistem pengaturan tegangan internal yang memastikan pasokan daya stabil ke mikrokontroler. Tegangan operasi yang didukung berkisar antara 2.0V hingga 3.6V.
5. Pin GPIO (General Purpose Input/Output)
STM32F103C8 memiliki hingga 37 pin GPIO yang dapat digunakan untuk menghubungkan berbagai perangkat eksternal seperti sensor, motor, LED, serta komunikasi dengan antarmuka seperti UART, SPI, dan I²C.
5.Percobaan [kembali]
A.Percobaan 1 (Kontrol Greenhouse)
Rangkaian:
Flowchart:
- MASTER
- SLAVE
Program:
A. MASTER
#include "main.h"
ADC_HandleTypeDef hadc1;
SPI_HandleTypeDef hspi1;
uint8_t txData[2];
uint32_t ldrValue;
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_ADC1_Init(void);
static void MX_SPI1_Init(void);
/*=========================================================*/
uint32_t Read_LDR(void)
{
HAL_ADC_Start(&hadc1);
HAL_ADC_PollForConversion(&hadc1,100);
return HAL_ADC_GetValue(&hadc1);
}
/*=========================================================*/
int main(void)
{
HAL_Init();
SystemClock_Config();
MX_GPIO_Init();
MX_ADC1_Init();
MX_SPI1_Init();
while (1)
{
ldrValue = Read_LDR();
if(HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_0)==GPIO_PIN_RESET)
txData[0] = 1;
else
txData[0] = 0;
if(ldrValue < 1500)
txData[1] = 1;
else
txData[1] = 0;
HAL_SPI_Transmit(&hspi1, txData, 2, 100);
HAL_Delay(200);
}
}
/*=========================================================*/
void SystemClock_Config(void)
{
}
/*=========================================================*/
static void MX_GPIO_Init(void)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
__HAL_RCC_GPIOA_CLK_ENABLE();
__HAL_RCC_GPIOB_CLK_ENABLE();
GPIO_InitStruct.Pin = GPIO_PIN_0;
GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
GPIO_InitStruct.Pull = GPIO_PULLUP;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
}
/*=========================================================*/
static void MX_ADC1_Init(void)
{
ADC_ChannelConfTypeDef sConfig = {0};
hadc1.Instance = ADC1;
hadc1.Init.ScanConvMode = ADC_SCAN_DISABLE;
hadc1.Init.ContinuousConvMode = DISABLE;
hadc1.Init.DiscontinuousConvMode = DISABLE;
hadc1.Init.ExternalTrigConv = ADC_SOFTWARE_START;
hadc1.Init.DataAlign = ADC_DATAALIGN_RIGHT;
hadc1.Init.NbrOfConversion = 1;
HAL_ADC_Init(&hadc1);
sConfig.Channel = ADC_CHANNEL_9;
sConfig.Rank = ADC_REGULAR_RANK_1;
sConfig.SamplingTime = ADC_SAMPLETIME_71CYCLES_5;
HAL_ADC_ConfigChannel(&hadc1, &sConfig);
}
/*=========================================================*/
static void MX_SPI1_Init(void)
{
hspi1.Instance = SPI1;
hspi1.Init.Mode = SPI_MODE_MASTER;
hspi1.Init.Direction = SPI_DIRECTION_2LINES;
hspi1.Init.DataSize = SPI_DATASIZE_8BIT;
hspi1.Init.CLKPolarity = SPI_POLARITY_LOW;
hspi1.Init.CLKPhase = SPI_PHASE_1EDGE;
hspi1.Init.NSS = SPI_NSS_HARD_OUTPUT;
hspi1.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_16;
hspi1.Init.FirstBit = SPI_FIRSTBIT_MSB;
hspi1.Init.TIMode = SPI_TIMODE_DISABLE;
hspi1.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE;
hspi1.Init.CRCPolynomial = 7;
HAL_SPI_Init(&hspi1);
}
B.SLAVE
#include "main.h"
SPI_HandleTypeDef hspi1;
uint8_t rxData[2];
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_SPI1_Init(void);
/*=========================================================*/
int main(void)
{
HAL_Init();
SystemClock_Config();
MX_GPIO_Init();
MX_SPI1_Init();
while (1)
{
HAL_SPI_Receive(&hspi1, rxData, 2, HAL_MAX_DELAY);
if(rxData[0]==1)
HAL_GPIO_WritePin(GPIOB,GPIO_PIN_0,GPIO_PIN_SET);
else
HAL_GPIO_WritePin(GPIOB,GPIO_PIN_0,GPIO_PIN_RESET);
if(rxData[1]==1)
HAL_GPIO_WritePin(GPIOB,GPIO_PIN_1,GPIO_PIN_RESET);
else
HAL_GPIO_WritePin(GPIOB,GPIO_PIN_1,GPIO_PIN_SET);
}
}
/*=========================================================*/
void SystemClock_Config(void)
{
}
/*=========================================================*/
static void MX_GPIO_Init(void)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
__HAL_RCC_GPIOA_CLK_ENABLE();
__HAL_RCC_GPIOB_CLK_ENABLE();
HAL_GPIO_WritePin(GPIOB, GPIO_PIN_0|GPIO_PIN_1,
GPIO_PIN_RESET);
GPIO_InitStruct.Pin = GPIO_PIN_0 | GPIO_PIN_1;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
}
/*=========================================================*/
static void MX_SPI1_Init(void)
{
hspi1.Instance = SPI1;
hspi1.Init.Mode = SPI_MODE_SLAVE;
hspi1.Init.Direction = SPI_DIRECTION_2LINES;
hspi1.Init.DataSize = SPI_DATASIZE_8BIT;
hspi1.Init.CLKPolarity = SPI_POLARITY_LOW;
hspi1.Init.CLKPhase = SPI_PHASE_1EDGE;
hspi1.Init.NSS = SPI_NSS_HARD_INPUT;
hspi1.Init.FirstBit = SPI_FIRSTBIT_MSB;
hspi1.Init.TIMode = SPI_TIMODE_DISABLE;
hspi1.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE;
hspi1.Init.CRCPolynomial = 7;
HAL_SPI_Init(&hspi1);
}
B.Percobaan 2 (Game Geomerty Jump)
Rangkaian :
Flowchart :
• Logika Game
- MASTER
- SLAVE
Program :
A.Program Master
- (main.c)
#include "main.h"
#include "ssd1306.h"
#include <stdio.h>
/* ================= SPI ================= */
SPI_HandleTypeDef hspi1;
/* ================= OLED I2C ================= */
I2C_HandleTypeDef hi2c1;
/* ================= COMMAND ================= */
#define CMD_GAME_RUN 0x01
#define CMD_GAME_OVER 0x02
#define CMD_JUMP_SOUND 0x03
#define CMD_HIT_SOUND 0x04
/* ================= CS PIN ================= */
#define CS_PORT GPIOA
#define CS_PIN GPIO_PIN_4
/* ================= GAME ================= */
int dinoY, velocityY, cactusX;
uint32_t score, highScore;
uint8_t isJumping, gameOver;
#define GRAVITY 2
#define FRAME_DELAY 30
#define GROUND_Y 48
#define DINO_HEIGHT 10
char buf[20];
/* ================= SEND SPI ================= */
void Send_To_Slave(uint8_t cmd)
{
HAL_GPIO_WritePin(CS_PORT, CS_PIN, GPIO_PIN_RESET);
HAL_SPI_Transmit(&hspi1, &cmd, 1, 100);
HAL_GPIO_WritePin(CS_PORT, CS_PIN, GPIO_PIN_SET);
HAL_Delay(1); // penting untuk sync slave
}
/* ================= MAIN ================= */
int main(void)
{
HAL_Init();
SystemClock_Config();
MX_GPIO_Init();
MX_SPI1_Init();
MX_I2C1_Init();
ssd1306_Init();
HAL_GPIO_WritePin(GPIOA, CS_PIN, GPIO_PIN_SET);
ResetGame();
while (1)
{
if (!gameOver)
{
UpdateGame();
DrawGame();
Send_To_Slave(CMD_GAME_RUN);
}
else
{
DrawGameOver();
if (score > highScore)
highScore = score;
Send_To_Slave(CMD_GAME_OVER);
if (HAL_GPIO_ReadPin(JUMP_BTN_GPIO_Port, JUMP_BTN_Pin) ==
GPIO_PIN_RESET)
{
ResetGame();
HAL_Delay(300);
}
}
HAL_Delay(FRAME_DELAY);
}
}
/* ================= GAME LOGIC ================= */
void UpdateGame(void)
{
if (HAL_GPIO_ReadPin(JUMP_BTN_GPIO_Port, JUMP_BTN_Pin) ==
GPIO_PIN_RESET && !isJumping)
{
velocityY = -12;
isJumping = 1;
Send_To_Slave(CMD_JUMP_SOUND);
}
dinoY += velocityY;
velocityY += GRAVITY;
if (dinoY >= GROUND_Y)
{
dinoY = GROUND_Y;
velocityY = 0;
isJumping = 0;
}
cactusX -= (6 + score / 15);
if (cactusX < -10)
{
cactusX = 128;
score++;
}
if (cactusX < 25 && cactusX > 5 && (dinoY + DINO_HEIGHT) > 48)
{
gameOver = 1;
Send_To_Slave(CMD_HIT_SOUND);
}
}
/* ================= DRAW ================= */
void DrawGame(void)
{
ssd1306_Fill(Black);
ssd1306_DrawRectangle(10, dinoY, 20, dinoY + DINO_HEIGHT,
White);
ssd1306_FillRectangle(cactusX, 48, cactusX + 8, 60, White);
ssd1306_Line(0, 61, 127, 61, White);
sprintf(buf, "Sc:%lu", score);
ssd1306_SetCursor(0, 0);
ssd1306_WriteString(buf, Font_7x10, White);
sprintf(buf, "Hsc:%lu", highScore);
ssd1306_SetCursor(80, 0);
ssd1306_WriteString(buf, Font_7x10, White);
ssd1306_UpdateScreen();
}
void DrawGameOver(void)
{
ssd1306_Fill(Black);
ssd1306_SetCursor(30, 15);
ssd1306_WriteString("GAME OVER", Font_7x10, White);
sprintf(buf, "HighScore:%lu", highScore);
ssd1306_SetCursor(25, 35);
ssd1306_WriteString(buf, Font_7x10, White);
ssd1306_UpdateScreen();
}
/* ================= RESET ================= */
void ResetGame(void)
{
dinoY = GROUND_Y;
velocityY = 0;
cactusX = 128;
score = 0;
isJumping = 0;
gameOver = 0;
}
/* ================= SPI INIT ================= */
void MX_SPI1_Init(void)
{
hspi1.Instance = SPI1;
hspi1.Init.Mode = SPI_MODE_MASTER;
hspi1.Init.Direction = SPI_DIRECTION_2LINES;
hspi1.Init.DataSize = SPI_DATASIZE_8BIT;
hspi1.Init.CLKPolarity = SPI_POLARITY_LOW;
hspi1.Init.CLKPhase = SPI_PHASE_1EDGE;
hspi1.Init.NSS = SPI_NSS_SOFT;
hspi1.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_16;
hspi1.Init.FirstBit = SPI_FIRSTBIT_MSB;
HAL_SPI_Init(&hspi1);
}
/* ================= GPIO ================= */
void MX_GPIO_Init(void)
{
__HAL_RCC_GPIOA_CLK_ENABLE();
GPIO_InitTypeDef GPIO_InitStruct = {0};
/* CS */
GPIO_InitStruct.Pin = GPIO_PIN_4;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
/* BUTTON */
GPIO_InitStruct.Pin = JUMP_BTN_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
GPIO_InitStruct.Pull = GPIO_PULLUP;
HAL_GPIO_Init(JUMP_BTN_GPIO_Port, &GPIO_InitStruct);
}
- Main.h
#ifndef __MAIN_H
#define __MAIN_H
#ifdef __cplusplus
extern "C" {
#endif
#include "stm32g4xx_hal.h"
#include "ssd1306.h"
#include "ssd1306_fonts.h"
#include <stdio.h>
/* Definisi Pin Hardware */
#define JUMP_BTN_Pin GPIO_PIN_0
#define JUMP_BTN_GPIO_Port GPIOA
/* Konstanta Permainan */
#define GROUND_Y 44
#define DINO_WIDTH 15
#define DINO_HEIGHT 15
/* Prototipe Fungsi */
void SystemClock_Config(void);
void MX_GPIO_Init(void);
void MX_I2C1_Init(void);
void Error_Handler(void);
#ifdef __cplusplus
}
#endif
#endif /* __MAIN_H */
B.Program Slave
- main c
#include "main.h"
/* ================= SPI ================= */
SPI_HandleTypeDef hspi1;
/* ================= COMMAND ================= */
#define CMD_GAME_RUN 0x01
#define CMD_GAME_OVER 0x02
#define CMD_JUMP_SOUND 0x03
#define CMD_HIT_SOUND 0x04
/* ================= PROTOTYPE ================= */
void SystemClock_Config(void);
void MX_GPIO_Init(void);
void MX_SPI1_Init(void);
void Send(uint8_t data);
/* ================= MAIN ================= */
int main(void)
{
HAL_Init();
SystemClock_Config();
MX_GPIO_Init();
MX_SPI1_Init();
while (1)
{
Send(CMD_GAME_RUN);
HAL_Delay(500);
Send(CMD_JUMP_SOUND);
HAL_Delay(500);
Send(CMD_GAME_OVER);
HAL_Delay(1000);
}
}
/* ================= SEND SPI ================= */
void Send(uint8_t data)
{
HAL_GPIO_WritePin(GPIOA, GPIO_PIN_4, GPIO_PIN_RESET); // CS LOW
HAL_SPI_Transmit(&hspi1, &data, 1, 100);
HAL_GPIO_WritePin(GPIOA, GPIO_PIN_4, GPIO_PIN_SET); // CS HIGH
}
/* ================= SPI INIT ================= */
void MX_SPI1_Init(void)
{
hspi1.Instance = SPI1;
hspi1.Init.Mode = SPI_MODE_MASTER;
hspi1.Init.Direction = SPI_DIRECTION_2LINES;
hspi1.Init.DataSize = SPI_DATASIZE_8BIT;
hspi1.Init.CLKPolarity = SPI_POLARITY_LOW;
hspi1.Init.CLKPhase = SPI_PHASE_1EDGE;
hspi1.Init.NSS = SPI_NSS_SOFT;
hspi1.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_16;
hspi1.Init.FirstBit = SPI_FIRSTBIT_MSB;
HAL_SPI_Init(&hspi1);
}
/* GPIO CS */
void MX_GPIO_Init(void)
{
__HAL_RCC_GPIOA_CLK_ENABLE();
GPIO_InitTypeDef GPIO_InitStruct = {0};
GPIO_InitStruct.Pin = GPIO_PIN_4;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
HAL_GPIO_WritePin(GPIOA, GPIO_PIN_4, GPIO_PIN_SET);
}
/* CLOCK (simple safe) */
void SystemClock_Config(void) {}
C.Percobaan 3 (Smart Entry Indicator)
Rangkaian :
Flowchart :
Program :
- NUCLEO
/* USER CODE BEGIN Header */
/**
*************************************************************
*****************
* @file : main.c
* @brief : Main program body
*************************************************************
*****************
* @attention
*
* Copyright (c) 2026 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found
in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is
provided AS-IS.
*
*************************************************************
*****************
*/
/* USER CODE END Header */
/* Includes -------------------------------------------------
-----------------*/
#include "main.h"
/* Private includes -----------------------------------------
-----------------*/
/* USER CODE BEGIN Includes */
/* USER CODE END Includes */
/* Private typedef ------------------------------------------
-----------------*/
/* USER CODE BEGIN PTD */
/* USER CODE END PTD */
/* Private define -------------------------------------------
-----------------*/
/* USER CODE BEGIN PD */
/* USER CODE END PD */
/* Private macro --------------------------------------------
-----------------*/
/* USER CODE BEGIN PM */
/* USER CODE END PM */
/* Private variables ----------------------------------------
-----------------*/
COM_InitTypeDef BspCOMInit;
UART_HandleTypeDef huart1;
/* USER CODE BEGIN PV */
uint8_t pir_state;
uint8_t data;
/* USER CODE END PV */
/* Private function prototypes ------------------------------
-----------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_USART1_UART_Init(void);
/* USER CODE BEGIN PFP */
/* USER CODE END PFP */
/* Private user code ----------------------------------------
-----------------*/
/* USER CODE BEGIN 0 */
/* USER CODE END 0 */
/**
* @brief The application entry point.
* @retval int
*/
int main(void)
{
/* USER CODE BEGIN 1 */
/* USER CODE END 1 */
/* MCU Configuration---------------------------------------
-----------------*/
/* Reset of all peripherals, Initializes the Flash
interface and the Systick. */
HAL_Init();
/* USER CODE BEGIN Init */
/* USER CODE END Init */
/* Configure the system clock */
SystemClock_Config();
/* USER CODE BEGIN SysInit */
/* USER CODE END SysInit */
/* Initialize all configured peripherals */
MX_GPIO_Init();
MX_USART1_UART_Init();
/* USER CODE BEGIN 2 */
/* USER CODE END 2 */
/* Initialize led */
BSP_LED_Init(LED_GREEN);
/* Initialize USER push-button, will be used to trigger an
interrupt each time it's pressed.*/
BSP_PB_Init(BUTTON_USER, BUTTON_MODE_EXTI);
/* Initialize COM1 port (115200, 8 bits (7-bit data + 1
stop bit), no parity */
BspCOMInit.BaudRate = 115200;
BspCOMInit.WordLength = COM_WORDLENGTH_8B;
BspCOMInit.StopBits = COM_STOPBITS_1;
BspCOMInit.Parity = COM_PARITY_NONE;
BspCOMInit.HwFlowCtl = COM_HWCONTROL_NONE;
if (BSP_COM_Init(COM1, &BspCOMInit) != BSP_ERROR_NONE)
{
Error_Handler();
}
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
pir_state = HAL_GPIO_ReadPin(GPIOA, GPIO_PIN_0);
if (pir_state == GPIO_PIN_SET)
data = '1';
else
data = '0';
HAL_UART_Transmit(&huart1, &data, 1, 100);
HAL_Delay(500);
}
}
/**
* @brief System Clock Configuration
* @retval None
*/
void SystemClock_Config(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct = {0};
RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
*/
HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1_
BOOST);
/** Initializes the RCC Oscillators according to the
specified parameters
* in the RCC_OscInitTypeDef structure.
*/
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
RCC_OscInitStruct.HSIState = RCC_HSI_ON;
RCC_OscInitStruct.HSICalibrationValue =
RCC_HSICALIBRATION_DEFAULT;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
RCC_OscInitStruct.PLL.PLLM = RCC_PLLM_DIV4;
RCC_OscInitStruct.PLL.PLLN = 85;
RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
RCC_OscInitStruct.PLL.PLLQ = RCC_PLLQ_DIV2;
RCC_OscInitStruct.PLL.PLLR = RCC_PLLR_DIV2;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
Error_Handler();
}
/** Initializes the CPU, AHB and APB buses clocks
*/
RCC_ClkInitStruct.ClockType =
RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
|RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct,
FLASH_LATENCY_4) != HAL_OK)
{
Error_Handler();
}
}
/**
* @brief USART1 Initialization Function
* @param None
* @retval None
*/
static void MX_USART1_UART_Init(void)
{
/* USER CODE BEGIN USART1_Init 0 */
/* USER CODE END USART1_Init 0 */
/* USER CODE BEGIN USART1_Init 1 */
/* USER CODE END USART1_Init 1 */
huart1.Instance = USART1;
huart1.Init.BaudRate = 9600;
huart1.Init.WordLength = UART_WORDLENGTH_8B;
huart1.Init.StopBits = UART_STOPBITS_1;
huart1.Init.Parity = UART_PARITY_NONE;
huart1.Init.Mode = UART_MODE_TX_RX;
huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
huart1.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
huart1.Init.ClockPrescaler = UART_PRESCALER_DIV1;
huart1.AdvancedInit.AdvFeatureInit =
UART_ADVFEATURE_NO_INIT;
if (HAL_UART_Init(&huart1) != HAL_OK)
{
Error_Handler();
}
if (HAL_UARTEx_SetTxFifoThreshold(&huart1,
UART_TXFIFO_THRESHOLD_1_8) != HAL_OK)
{
Error_Handler();
}
if (HAL_UARTEx_SetRxFifoThreshold(&huart1,
UART_RXFIFO_THRESHOLD_1_8) != HAL_OK)
{
Error_Handler();
}
if (HAL_UARTEx_DisableFifoMode(&huart1) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN USART1_Init 2 */
/* USER CODE END USART1_Init 2 */
}
/**
* @brief GPIO Initialization Function
* @param None
* @retval None
*/
static void MX_GPIO_Init(void)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
/* USER CODE BEGIN MX_GPIO_Init_1 */
/* USER CODE END MX_GPIO_Init_1 */
/* GPIO Ports Clock Enable */
__HAL_RCC_GPIOC_CLK_ENABLE();
__HAL_RCC_GPIOF_CLK_ENABLE();
__HAL_RCC_GPIOA_CLK_ENABLE();
__HAL_RCC_GPIOB_CLK_ENABLE();
/*Configure GPIO pin : PA0 */
GPIO_InitStruct.Pin = GPIO_PIN_0;
GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
GPIO_InitStruct.Pull = GPIO_NOPULL;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
/* USER CODE BEGIN MX_GPIO_Init_2 */
/* USER CODE END MX_GPIO_Init_2 */
}
/* USER CODE BEGIN 4 */
/* USER CODE END 4 */
/**
* @brief This function is executed in case of error
occurrence.
* @retval None
*/
void Error_Handler(void)
{
/* USER CODE BEGIN Error_Handler_Debug */
/* User can add his own implementation to report the HAL
error return state */
__disable_irq();
while (1)
{
}
/* USER CODE END Error_Handler_Debug */
}
#ifdef USE_FULL_ASSERT
/**
* @brief Reports the name of the source file and the
source line number
* where the assert_param error has occurred.
* @param file: pointer to the source file name
* @param line: assert_param error line source number
* @retval None
*/
void assert_failed(uint8_t *file, uint32_t line)
{
/* USER CODE BEGIN 6 */
/* User can add his own implementation to report the file
name and line number,
ex: printf("Wrong parameters value: file %s on line
%d\r\n", file, line) */
/* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */
- BLUEPILL
/* USER CODE BEGIN Header */
/* USER CODE END Header */
/* Includes -------------------------------------------------
-----------------*/
#include "main.h"
/* Private includes -----------------------------------------
-----------------*/
/* USER CODE BEGIN Includes */
/* USER CODE END Includes */
/* Private typedef ------------------------------------------
-----------------*/
/* USER CODE BEGIN PTD */
/* USER CODE END PTD */
/* Private define -------------------------------------------
-----------------*/
/* USER CODE BEGIN PD */
/* USER CODE END PD */
/* Private macro --------------------------------------------
-----------------*/
/* USER CODE BEGIN PM */
/* USER CODE END PM */
/* Private variables ----------------------------------------
-----------------*/
UART_HandleTypeDef huart1;
/* USER CODE BEGIN PV */
uint8_t rx_data;
/* USER CODE END PV */
/* Private function prototypes ------------------------------
-----------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_USART1_UART_Init(void);
/* USER CODE BEGIN PFP */
/* USER CODE END PFP */
/* Private user code ----------------------------------------
-----------------*/
/* USER CODE BEGIN 0 */
/* USER CODE END 0 */
/**
* @brief The application entry point.
* @retval int
*/
int main(void)
{
/* USER CODE BEGIN 1 */
/* USER CODE END 1 */
/* MCU Configuration---------------------------------------
-----------------*/
/* Reset of all peripherals, Initializes the Flash
interface and the Systick. */
HAL_Init();
/* USER CODE BEGIN Init */
/* USER CODE END Init */
/* Configure the system clock */
SystemClock_Config();
/* USER CODE BEGIN SysInit */
/* USER CODE END SysInit */
/* Initialize all configured peripherals */
MX_GPIO_Init();
MX_USART1_UART_Init();
/* USER CODE BEGIN 2 */
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
// Coba terima data (tidak blocking lama)
if (HAL_UART_Receive(&huart1, &rx_data, 1, 10) ==
HAL_OK)
{
if (rx_data == '1')
{
HAL_GPIO_WritePin(GPIOA, GPIO_PIN_5,
GPIO_PIN_SET); // LED ON
}
else if (rx_data == '0')
{
HAL_GPIO_WritePin(GPIOA, GPIO_PIN_5,
GPIO_PIN_RESET); // LED OFF
}
}
else
{
// Kalau tidak ada data → LED kedip
HAL_GPIO_TogglePin(GPIOA, GPIO_PIN_5);
HAL_Delay(200);
}
}
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
/* USER CODE END 3 */
}
/**
* @brief System Clock Configuration
* @retval None
*/
void SystemClock_Config(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct = {0};
RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
/** Initializes the RCC Oscillators according to the
specified parameters
* in the RCC_OscInitTypeDef structure.
*/
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
RCC_OscInitStruct.HSIState = RCC_HSI_ON;
RCC_OscInitStruct.HSICalibrationValue =
RCC_HSICALIBRATION_DEFAULT;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
Error_Handler();
}
/** Initializes the CPU, AHB and APB buses clocks
*/
RCC_ClkInitStruct.ClockType =
RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
|RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK)
{
Error_Handler();
}
}
/**
* @brief USART1 Initialization Function
* @param None
* @retval None
*/
static void MX_USART1_UART_Init(void)
{
/* USER CODE BEGIN USART1_Init 0 */
/* USER CODE END USART1_Init 0 */
/* USER CODE BEGIN USART1_Init 1 */
/* USER CODE END USART1_Init 1 */
huart1.Instance = USART1;
huart1.Init.BaudRate = 9600;
huart1.Init.WordLength = UART_WORDLENGTH_8B;
huart1.Init.StopBits = UART_STOPBITS_1;
huart1.Init.Parity = UART_PARITY_NONE;
huart1.Init.Mode = UART_MODE_TX_RX;
huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
huart1.Init.OverSampling = UART_OVERSAMPLING_16;
if (HAL_UART_Init(&huart1) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN USART1_Init 2 */
/* USER CODE END USART1_Init 2 */
}
/**
* @brief GPIO Initialization Function
* @param None
* @retval None
*/
static void MX_GPIO_Init(void)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
/* USER CODE BEGIN MX_GPIO_Init_1 */
/* USER CODE END MX_GPIO_Init_1 */
/* GPIO Ports Clock Enable */
__HAL_RCC_GPIOA_CLK_ENABLE();
/*Configure GPIO pin Output Level */
HAL_GPIO_WritePin(GPIOA, GPIO_PIN_5, GPIO_PIN_RESET);
/*Configure GPIO pin : PA5 */
GPIO_InitStruct.Pin = GPIO_PIN_5;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
/* USER CODE BEGIN MX_GPIO_Init_2 */
/* USER CODE END MX_GPIO_Init_2 */
}
/* USER CODE BEGIN 4 */
/* USER CODE END 4 */
/**
* @brief This function is executed in case of error
occurrence.
* @retval None
*/
void Error_Handler(void)
{
/* USER CODE BEGIN Error_Handler_Debug */
/* USER CODE END Error_Handler_Debug */
}
#ifdef USE_FULL_ASSERT
/**
* @brief Reports the name of the source file and the
source line number
* where the assert_param error has occurred.
* @param file: pointer to the source file name
* @param line: assert_param error line source number
* @retval None
*/
void assert_failed(uint8_t *file, uint32_t line)
{
/* USER CODE BEGIN 6 */
/* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */
D.Percobaan 4 (SISTEM PARKIR OTOMATIS 2 PINTU)
Rangkaian :
Flowchart :
Program :
- NUCLEO 1
/* USER CODE BEGIN Header */
/**
************************************************************
******************
* @file : main.c
* @brief : Master Parking System - STM32G474RE
************************************************************
******************
*/
/* USER CODE END Header */
/* Includes ------------------------------------------------
------------------*/
#include "main.h"
/* Private includes ----------------------------------------
------------------*/
/* USER CODE BEGIN Includes */
#define SSD1306_INCLUDE_FONT_7x10
#include "ssd1306.h"
#include "ssd1306_fonts.h"
#include <stdio.h>
#include <string.h>
/* USER CODE END Includes */
/* Private typedef -----------------------------------------
------------------*/
/* USER CODE BEGIN PTD */
/* USER CODE END PTD */
/* Private define ------------------------------------------
------------------*/
/* USER CODE BEGIN PD */
#define MAX_PARKIR 10
/* USER CODE END PD */
/* Private macro -------------------------------------------
------------------*/
/* USER CODE BEGIN PM */
/* USER CODE END PM */
/* Private variables ---------------------------------------
------------------*/
COM_InitTypeDef BspCOMInit;
I2C_HandleTypeDef hi2c1;
TIM_HandleTypeDef htim2;
UART_HandleTypeDef huart1; // komunikasi ke slave (PC4/PC5)
UART_HandleTypeDef huart2; // serial monitor via BSP COM1
(PA2/PA3)
/* USER CODE BEGIN PV */
uint8_t sisa_parkir = MAX_PARKIR;
uint8_t kendaraan_masuk = 0;
uint8_t uart_rx_buffer[1];
/* USER CODE END PV */
/* Private function prototypes -----------------------------
------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_I2C1_Init(void);
static void MX_TIM2_Init(void);
static void MX_USART1_UART_Init(void);
static void MX_USART2_UART_Init(void);
/* USER CODE BEGIN PFP */
void Update_Display(void);
void Servo_Buka(void);
void Servo_Tutup(void);
/* USER CODE END PFP */
/* USER CODE BEGIN 0 */
/* USER CODE END 0 */
int main(void)
{
/* USER CODE BEGIN 1 */
/* USER CODE END 1 */
HAL_Init();
/* USER CODE BEGIN Init */
/* USER CODE END Init */
SystemClock_Config();
/* USER CODE BEGIN SysInit */
/* USER CODE END SysInit */
MX_GPIO_Init();
MX_I2C1_Init();
MX_TIM2_Init();
MX_USART1_UART_Init();
MX_USART2_UART_Init();
/* USER CODE BEGIN 2 */
BSP_LED_Init(LED_GREEN);
BSP_PB_Init(BUTTON_USER, BUTTON_MODE_EXTI);
// Serial monitor via BSP COM1 (USART2 PA2/PA3)
BspCOMInit.BaudRate = 115200;
BspCOMInit.WordLength = COM_WORDLENGTH_8B;
BspCOMInit.StopBits = COM_STOPBITS_1;
BspCOMInit.Parity = COM_PARITY_NONE;
BspCOMInit.HwFlowCtl = COM_HWCONTROL_NONE;
if (BSP_COM_Init(COM1, &BspCOMInit) != BSP_ERROR_NONE) {
Error_Handler();
}
ssd1306_Init();
HAL_TIM_PWM_Start(&htim2, TIM_CHANNEL_1);
htim2.Instance->CCR1 = 1000;
// USART1 untuk komunikasi ke slave (PC4=TX, PC5=RX)
HAL_UART_Receive_IT(&huart1, uart_rx_buffer, 1);
printf("=== MASTER PARKING READY ===\r\n");
printf("Slot tersedia: %d/%d\r\n", sisa_parkir,
MAX_PARKIR);
Update_Display();
/* USER CODE END 2 */
/* USER CODE BEGIN WHILE */
while (1)
{
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
uint8_t ir =
!HAL_GPIO_ReadPin(MASTER_IR_SENSOR_GPIO_Port,
MASTER_IR_SENSOR_Pin);
printf("IR: %d | Sisa: %d\r\n", ir, sisa_parkir);
// DETEKSI MASUK
if (ir && sisa_parkir > 0 && !kendaraan_masuk) {
HAL_Delay(50);
ir = !HAL_GPIO_ReadPin(MASTER_IR_SENSOR_GPIO_Port,
MASTER_IR_SENSOR_Pin);
if (ir) {
Servo_Buka();
sisa_parkir--;
kendaraan_masuk = 1;
Update_Display();
printf(">> MASUK! Sisa: %d/%d\r\n", sisa_parkir,
MAX_PARKIR);
HAL_UART_Transmit(&huart1, (uint8_t*)"M", 1, 100);
}
}
// PARKIR PENUH
if (ir && sisa_parkir == 0 && !kendaraan_masuk) {
printf(">> PARKIR PENUH!\r\n");
BSP_LED_Toggle(LED_GREEN);
HAL_Delay(200);
}
// KENDARAAN SUDAH LEWAT
if (!ir && kendaraan_masuk) {
HAL_Delay(50);
ir = !HAL_GPIO_ReadPin(MASTER_IR_SENSOR_GPIO_Port,
MASTER_IR_SENSOR_Pin);
if (!ir) {
Servo_Tutup();
kendaraan_masuk = 0;
printf(">> Palang ditutup\r\n");
}
}
HAL_Delay(100);
}
/* USER CODE END 3 */
}
/* USER CODE BEGIN 4 */
void Update_Display(void) {
char buf[25];
ssd1306_Fill(Black);
ssd1306_SetCursor(2, 0);
ssd1306_WriteString("SISTEM PARKIR", Font_7x10, White);
ssd1306_SetCursor(2, 14);
sprintf(buf, "Slot: %d/%d", sisa_parkir, MAX_PARKIR);
ssd1306_WriteString(buf, Font_7x10, White);
ssd1306_SetCursor(2, 28);
if (sisa_parkir == 0) {
ssd1306_WriteString(">> PENUH <<", Font_7x10, White);
} else {
ssd1306_WriteString(">> TERSEDIA <<", Font_7x10, White);
}
ssd1306_UpdateScreen();
}
void Servo_Buka(void) {
htim2.Instance->CCR1 = 2000;
HAL_Delay(600);
}
void Servo_Tutup(void) {
htim2.Instance->CCR1 = 1000;
HAL_Delay(600);
}
// Terima dari slave via USART1 (PC5=RX)
void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
{
if (huart->Instance == USART1)
{
if (uart_rx_buffer[0] == 'K')
{
if(sisa_parkir < MAX_PARKIR) sisa_parkir++;
printf(">> KENDARAAN KELUAR (SLAVE)\r\n");
printf(">> Sisa: %d/%d\r\n", sisa_parkir, MAX_PARKIR);
Update_Display();
}
HAL_UART_Receive_IT(&huart1, uart_rx_buffer, 1);
}
}
/* USER CODE END 4 */
void SystemClock_Config(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct = {0};
RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1
_BOOST);
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
RCC_OscInitStruct.HSIState = RCC_HSI_ON;
RCC_OscInitStruct.HSICalibrationValue =
RCC_HSICALIBRATION_DEFAULT;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
RCC_OscInitStruct.PLL.PLLM = RCC_PLLM_DIV4;
RCC_OscInitStruct.PLL.PLLN = 85;
RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
RCC_OscInitStruct.PLL.PLLQ = RCC_PLLQ_DIV2;
RCC_OscInitStruct.PLL.PLLR = RCC_PLLR_DIV2;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
Error_Handler();
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK |
RCC_CLOCKTYPE_SYSCLK
| RCC_CLOCKTYPE_PCLK1 |
RCC_CLOCKTYPE_PCLK2;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct,
FLASH_LATENCY_4) != HAL_OK) Error_Handler();
}
static void MX_I2C1_Init(void)
{
hi2c1.Instance = I2C1;
hi2c1.Init.Timing = 0x40B285C2;
hi2c1.Init.OwnAddress1 = 0;
hi2c1.Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT;
hi2c1.Init.DualAddressMode = I2C_DUALADDRESS_DISABLE;
hi2c1.Init.OwnAddress2 = 0;
hi2c1.Init.OwnAddress2Masks = I2C_OA2_NOMASK;
hi2c1.Init.GeneralCallMode = I2C_GENERALCALL_DISABLE;
hi2c1.Init.NoStretchMode = I2C_NOSTRETCH_DISABLE;
if (HAL_I2C_Init(&hi2c1) != HAL_OK) Error_Handler();
if (HAL_I2CEx_ConfigAnalogFilter(&hi2c1,
I2C_ANALOGFILTER_ENABLE) != HAL_OK) Error_Handler();
if (HAL_I2CEx_ConfigDigitalFilter(&hi2c1, 0) != HAL_OK)
Error_Handler();
}
static void MX_TIM2_Init(void)
{
TIM_ClockConfigTypeDef sClockSourceConfig = {0};
TIM_MasterConfigTypeDef sMasterConfig = {0};
TIM_OC_InitTypeDef sConfigOC = {0};
htim2.Instance = TIM2;
htim2.Init.Prescaler = 169;
htim2.Init.CounterMode = TIM_COUNTERMODE_UP;
htim2.Init.Period = 19999;
htim2.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
htim2.Init.AutoReloadPreload =
TIM_AUTORELOAD_PRELOAD_DISABLE;
if (HAL_TIM_Base_Init(&htim2) != HAL_OK) Error_Handler();
sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL;
if (HAL_TIM_ConfigClockSource(&htim2, &sClockSourceConfig)
!= HAL_OK) Error_Handler();
if (HAL_TIM_PWM_Init(&htim2) != HAL_OK) Error_Handler();
sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
sMasterConfig.MasterSlaveMode =
TIM_MASTERSLAVEMODE_DISABLE;
if (HAL_TIMEx_MasterConfigSynchronization(&htim2,
&sMasterConfig) != HAL_OK) Error_Handler();
sConfigOC.OCMode = TIM_OCMODE_PWM1;
sConfigOC.Pulse = 1000;
sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;
sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;
if (HAL_TIM_PWM_ConfigChannel(&htim2, &sConfigOC,
TIM_CHANNEL_1) != HAL_OK) Error_Handler();
HAL_TIM_MspPostInit(&htim2);
}
static void MX_USART1_UART_Init(void)
{
// USART1 - komunikasi ke slave (PC4=TX, PC5=RX) 9600 baud
huart1.Instance = USART1;
huart1.Init.BaudRate = 9600;
huart1.Init.WordLength = UART_WORDLENGTH_8B;
huart1.Init.StopBits = UART_STOPBITS_1;
huart1.Init.Parity = UART_PARITY_NONE;
huart1.Init.Mode = UART_MODE_TX_RX;
huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
huart1.Init.OverSampling = UART_OVERSAMPLING_16;
huart1.Init.OneBitSampling =
UART_ONE_BIT_SAMPLE_DISABLE;
huart1.Init.ClockPrescaler = UART_PRESCALER_DIV1;
huart1.AdvancedInit.AdvFeatureInit =
UART_ADVFEATURE_NO_INIT;
if (HAL_UART_Init(&huart1) != HAL_OK) Error_Handler();
if (HAL_UARTEx_SetTxFifoThreshold(&huart1,
UART_TXFIFO_THRESHOLD_1_8) != HAL_OK) Error_Handler();
if (HAL_UARTEx_SetRxFifoThreshold(&huart1,
UART_RXFIFO_THRESHOLD_1_8) != HAL_OK) Error_Handler();
if (HAL_UARTEx_DisableFifoMode(&huart1) != HAL_OK)
Error_Handler();
}
static void MX_USART2_UART_Init(void)
{
// USART2 - serial monitor via BSP COM1 (PA2=TX, PA3=RX)
huart2.Instance = USART2;
huart2.Init.BaudRate = 115200;
huart2.Init.WordLength = UART_WORDLENGTH_8B;
huart2.Init.StopBits = UART_STOPBITS_1;
huart2.Init.Parity = UART_PARITY_NONE;
huart2.Init.Mode = UART_MODE_TX_RX;
huart2.Init.HwFlowCtl = UART_HWCONTROL_NONE;
huart2.Init.OverSampling = UART_OVERSAMPLING_16;
huart2.Init.OneBitSampling =
UART_ONE_BIT_SAMPLE_DISABLE;
huart2.Init.ClockPrescaler = UART_PRESCALER_DIV1;
huart2.AdvancedInit.AdvFeatureInit =
UART_ADVFEATURE_NO_INIT;
if (HAL_UART_Init(&huart2) != HAL_OK) Error_Handler();
if (HAL_UARTEx_SetTxFifoThreshold(&huart2,
UART_TXFIFO_THRESHOLD_1_8) != HAL_OK) Error_Handler();
if (HAL_UARTEx_SetRxFifoThreshold(&huart2,
UART_RXFIFO_THRESHOLD_1_8) != HAL_OK) Error_Handler();
if (HAL_UARTEx_DisableFifoMode(&huart2) != HAL_OK)
Error_Handler();
}
static void MX_GPIO_Init(void)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
__HAL_RCC_GPIOC_CLK_ENABLE();
__HAL_RCC_GPIOF_CLK_ENABLE();
__HAL_RCC_GPIOA_CLK_ENABLE();
__HAL_RCC_GPIOB_CLK_ENABLE();
// IR sensor PA1 - aktif LOW → PULLUP
GPIO_InitStruct.Pin = MASTER_IR_SENSOR_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
GPIO_InitStruct.Pull = GPIO_PULLUP;
HAL_GPIO_Init(MASTER_IR_SENSOR_GPIO_Port,
&GPIO_InitStruct);
// USART1 TX=PC4, RX=PC5 untuk komunikasi ke slave
GPIO_InitStruct.Pin = MASTER_TX_Pin | MASTER_RX_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
GPIO_InitStruct.Alternate = GPIO_AF7_USART1;
HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
}
void Error_Handler(void)
{
__disable_irq();
while (1) {}
}
#ifdef USE_FULL_ASSERT
void assert_failed(uint8_t *file, uint32_t line) {}
#endif
- NUCLEO 2
/* USER CODE BEGIN Header */
/**
**************************************************************
****************
* @file : main.c
* @brief : Slave Parking System - STM32G474RE
(Pintu Keluar)
**************************************************************
****************
*/
/* USER CODE END Header */
/* Includes --------------------------------------------------
----------------*/
#include "main.h"
/* Private includes ------------------------------------------
----------------*/
/* USER CODE BEGIN Includes */
#include <stdio.h>
#include <string.h>
/* USER CODE END Includes */
/* Private typedef -------------------------------------------
----------------*/
/* USER CODE BEGIN PTD */
/* USER CODE END PTD */
/* Private define --------------------------------------------
----------------*/
/* USER CODE BEGIN PD */
/* USER CODE END PD */
/* Private macro ---------------------------------------------
----------------*/
/* USER CODE BEGIN PM */
/* USER CODE END PM */
/* Private variables -----------------------------------------
----------------*/
COM_InitTypeDef BspCOMInit;
TIM_HandleTypeDef htim2;
UART_HandleTypeDef huart1;
UART_HandleTypeDef huart2;
/* USER CODE BEGIN PV */
uint8_t kendaraan_keluar = 0;
uint8_t uart_rx_buffer[1];
/* USER CODE END PV */
/* Private function prototypes -------------------------------
----------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_TIM2_Init(void);
static void MX_USART1_UART_Init(void);
static void MX_USART2_UART_Init(void);
/* USER CODE BEGIN PFP */
void Servo_Buka(void);
void Servo_Tutup(void);
/* USER CODE END PFP */
/* USER CODE BEGIN 0 */
/* USER CODE END 0 */
int main(void)
{
/* USER CODE BEGIN 1 */
/* USER CODE END 1 */
HAL_Init();
/* USER CODE BEGIN Init */
/* USER CODE END Init */
SystemClock_Config();
/* USER CODE BEGIN SysInit */
/* USER CODE END SysInit */
MX_GPIO_Init();
MX_TIM2_Init();
MX_USART1_UART_Init();
MX_USART2_UART_Init();
/* USER CODE BEGIN 2 */
BSP_LED_Init(LED_GREEN);
BSP_PB_Init(BUTTON_USER, BUTTON_MODE_EXTI);
BspCOMInit.BaudRate = 115200;
BspCOMInit.WordLength = COM_WORDLENGTH_8B;
BspCOMInit.StopBits = COM_STOPBITS_1;
BspCOMInit.Parity = COM_PARITY_NONE;
BspCOMInit.HwFlowCtl = COM_HWCONTROL_NONE;
if (BSP_COM_Init(COM1, &BspCOMInit) != BSP_ERROR_NONE) {
Error_Handler();
}
HAL_TIM_PWM_Start(&htim2, TIM_CHANNEL_1);
htim2.Instance->CCR1 = 1000;
// USART2 RX interrupt - terima dari master
HAL_UART_Receive_IT(&huart1, uart_rx_buffer, 1);
HAL_GPIO_WritePin(LED_GREEN_GPIO_Port, LED_GREEN_Pin,
GPIO_PIN_RESET);
printf("=== SLAVE READY - Pintu Keluar ===\r\n");
/* USER CODE END 2 */
/* USER CODE BEGIN WHILE */
while (1)
{
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
uint8_t ir = !HAL_GPIO_ReadPin(SLAVE_IR_SENSOR_GPIO_Port,
SLAVE_IR_SENSOR_Pin);
printf("IR: %d\r\n", ir);
// === DETEKSI KENDARAAN KELUAR ===
if (ir && !kendaraan_keluar) {
HAL_Delay(50);
ir = !HAL_GPIO_ReadPin(SLAVE_IR_SENSOR_GPIO_Port,
SLAVE_IR_SENSOR_Pin);
if (ir) {
Servo_Buka();
// 1. buka palang
kendaraan_keluar = 1;
// 2. set flag
HAL_UART_Transmit(&huart1, (uint8_t*)"K", 1, 100); //
3. kirim ke master
HAL_GPIO_WritePin(LED_GREEN_GPIO_Port, LED_GREEN_Pin,
GPIO_PIN_SET);
printf(">> KELUAR! Kuota +1 dikirim ke master\r\n");
}
}
// === KENDARAAN SUDAH LEWAT ===
if (!ir && kendaraan_keluar) {
HAL_Delay(50);
ir = !HAL_GPIO_ReadPin(SLAVE_IR_SENSOR_GPIO_Port,
SLAVE_IR_SENSOR_Pin);
if (!ir) {
Servo_Tutup();
kendaraan_keluar = 0;
HAL_GPIO_WritePin(LED_GREEN_GPIO_Port, LED_GREEN_Pin,
GPIO_PIN_RESET);
printf(">> Palang ditutup, siap kendaraan
berikutnya\r\n");
}
}
HAL_Delay(100);
}
/* USER CODE END 3 */
}
/* USER CODE BEGIN 4 */
void Servo_Buka(void) {
htim2.Instance->CCR1 = 2000;
HAL_Delay(600);
}
void Servo_Tutup(void) {
htim2.Instance->CCR1 = 1000;
HAL_Delay(600);
}
// Terima info dari master via USART2
void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
{
if (huart->Instance == USART1)
{
if (uart_rx_buffer[0] == 'M')
{
printf(">> INFO: KENDARAAN MASUK (MASTER)\r\n");
}
HAL_UART_Receive_IT(&huart1, uart_rx_buffer, 1);
}
}
/* USER CODE END 4 */
void SystemClock_Config(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct = {0};
RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1_B
OOST);
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
RCC_OscInitStruct.HSIState = RCC_HSI_ON;
RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
RCC_OscInitStruct.PLL.PLLM = RCC_PLLM_DIV4;
RCC_OscInitStruct.PLL.PLLN = 85;
RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
RCC_OscInitStruct.PLL.PLLQ = RCC_PLLQ_DIV2;
RCC_OscInitStruct.PLL.PLLR = RCC_PLLR_DIV2;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
Error_Handler();
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK |
RCC_CLOCKTYPE_SYSCLK
| RCC_CLOCKTYPE_PCLK1 |
RCC_CLOCKTYPE_PCLK2;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_4)
!= HAL_OK) Error_Handler();
}
static void MX_TIM2_Init(void)
{
TIM_ClockConfigTypeDef sClockSourceConfig = {0};
TIM_MasterConfigTypeDef sMasterConfig = {0};
TIM_OC_InitTypeDef sConfigOC = {0};
htim2.Instance = TIM2;
htim2.Init.Prescaler = 169;
htim2.Init.CounterMode = TIM_COUNTERMODE_UP;
htim2.Init.Period = 19999;
htim2.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
htim2.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;
if (HAL_TIM_Base_Init(&htim2) != HAL_OK) Error_Handler();
sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL;
if (HAL_TIM_ConfigClockSource(&htim2, &sClockSourceConfig)
!= HAL_OK) Error_Handler();
if (HAL_TIM_PWM_Init(&htim2) != HAL_OK) Error_Handler();
sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
sMasterConfig.MasterSlaveMode =
TIM_MASTERSLAVEMODE_DISABLE;
if (HAL_TIMEx_MasterConfigSynchronization(&htim2,
&sMasterConfig) != HAL_OK) Error_Handler();
sConfigOC.OCMode = TIM_OCMODE_PWM1;
sConfigOC.Pulse = 1000;
sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;
sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;
if (HAL_TIM_PWM_ConfigChannel(&htim2, &sConfigOC,
TIM_CHANNEL_1) != HAL_OK) Error_Handler();
HAL_TIM_MspPostInit(&htim2);
}
static void MX_USART1_UART_Init(void)
{
huart1.Instance = USART1;
huart1.Init.BaudRate = 9600;
huart1.Init.WordLength = UART_WORDLENGTH_8B;
huart1.Init.StopBits = UART_STOPBITS_1;
huart1.Init.Parity = UART_PARITY_NONE;
huart1.Init.Mode = UART_MODE_TX_RX;
huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
huart1.Init.OverSampling = UART_OVERSAMPLING_16;
huart1.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
huart1.Init.ClockPrescaler = UART_PRESCALER_DIV1;
huart1.AdvancedInit.AdvFeatureInit =
UART_ADVFEATURE_NO_INIT;
if (HAL_UART_Init(&huart1) != HAL_OK) Error_Handler();
if (HAL_UARTEx_SetTxFifoThreshold(&huart1,
UART_TXFIFO_THRESHOLD_1_8) != HAL_OK) Error_Handler();
if (HAL_UARTEx_SetRxFifoThreshold(&huart1,
UART_RXFIFO_THRESHOLD_1_8) != HAL_OK) Error_Handler();
if (HAL_UARTEx_DisableFifoMode(&huart1) != HAL_OK)
Error_Handler();
}
static void MX_USART2_UART_Init(void)
{
huart2.Instance = USART2;
huart2.Init.BaudRate = 115200;
huart2.Init.WordLength = UART_WORDLENGTH_8B;
huart2.Init.StopBits = UART_STOPBITS_1;
huart2.Init.Parity = UART_PARITY_NONE;
huart2.Init.Mode = UART_MODE_TX_RX;
huart2.Init.HwFlowCtl = UART_HWCONTROL_NONE;
huart2.Init.OverSampling = UART_OVERSAMPLING_16;
huart2.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
huart2.Init.ClockPrescaler = UART_PRESCALER_DIV1;
huart2.AdvancedInit.AdvFeatureInit =
UART_ADVFEATURE_NO_INIT;
if (HAL_UART_Init(&huart2) != HAL_OK) Error_Handler();
if (HAL_UARTEx_SetTxFifoThreshold(&huart2,
UART_TXFIFO_THRESHOLD_1_8) != HAL_OK) Error_Handler();
if (HAL_UARTEx_SetRxFifoThreshold(&huart2,
UART_RXFIFO_THRESHOLD_1_8) != HAL_OK) Error_Handler();
if (HAL_UARTEx_DisableFifoMode(&huart2) != HAL_OK)
Error_Handler();
}
static void MX_GPIO_Init(void)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
__HAL_RCC_GPIOC_CLK_ENABLE();
__HAL_RCC_GPIOF_CLK_ENABLE();
__HAL_RCC_GPIOA_CLK_ENABLE();
__HAL_RCC_GPIOB_CLK_ENABLE();
// LED GREEN PB7 - output
HAL_GPIO_WritePin(LED_GREEN_GPIO_Port, LED_GREEN_Pin,
GPIO_PIN_RESET);
GPIO_InitStruct.Pin = LED_GREEN_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
HAL_GPIO_Init(LED_GREEN_GPIO_Port, &GPIO_InitStruct);
// IR sensor PA1 - aktif LOW → PULLUP
GPIO_InitStruct.Pin = SLAVE_IR_SENSOR_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
GPIO_InitStruct.Pull = GPIO_PULLUP;
HAL_GPIO_Init(SLAVE_IR_SENSOR_GPIO_Port, &GPIO_InitStruct);
// USART2 PA2=TX, PA3=RX untuk komunikasi ke master
GPIO_InitStruct.Pin = SLAVE_USART1_TX_Pin |
SLAVE_USART1_RX_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
GPIO_InitStruct.Alternate = GPIO_AF7_USART1;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
}
void Error_Handler(void)
{
__disable_irq();
while (1) {}
}
#ifdef USE_FULL_ASSERT
void assert_failed(uint8_t *file, uint32_t line) {}
#endif
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